Baby Sleep Patterns

Okay so when we first brought our son home, he was 1 week old and slept normal and woke up every 2 hours to be fed and changed. Then he slowly progressed into sleeping and waking every 3 hours maybe, but staying awake FAITHFULLY from 12AM-5AM every night. Last night, at a month and a day old, he slept ALL NIGHT. Woke up once at like 4AM to be fed and went right back to sleep. Then he slept almost all day today, just woke up at 1PM to be fed, and he is BACK TO SLEEP! He seems to feel fine and look fine.. But of course as a FTM, I am concerned. Is this normal?